CN209927104U - All-round sensitization tilt angle sensor of fiber grating - Google Patents
All-round sensitization tilt angle sensor of fiber grating Download PDFInfo
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- CN209927104U CN209927104U CN201920238601.4U CN201920238601U CN209927104U CN 209927104 U CN209927104 U CN 209927104U CN 201920238601 U CN201920238601 U CN 201920238601U CN 209927104 U CN209927104 U CN 209927104U
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- 239000000835 fiber Substances 0.000 title claims abstract description 26
- 206010070834 Sensitisation Diseases 0.000 title claims abstract description 20
- 230000008313 sensitization Effects 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses an all-round sensitization tilt sensor of fiber grating, including the major axis, along with the rotating turret that the major axis rotates and swings, minor axis, cross axle, first eccentric cam, two second eccentric cams, the frame that the cover is established on second eccentric cam circumference outer fringe, horizontal push rod, the pendulum rod of being fixed in on the minor axis; two ends of the transverse push rod are connected with a first elastic rope, and the other end of the first elastic rope is fixed on the end face of the rotating frame; the first elastic rope is provided with a strain grating; a second elastic rope is fixed on the frame, and the second elastic rope is also provided with a strain grating; the two eccentric wheels rotate to cause the extension of the elastic rope, and the strain grating is attached to the elastic rope to sense the eccentric angle of the eccentric wheels, so that the inclination angle of the swing rod can be monitored. The utility model discloses can realize 360 degrees all-round real-time supervision at inclination, have advantages such as measuring range is wide, sensitivity is high, simple structure, with low costs, anti bad weather is strong, but wide application in the environment of various complicacies.
Description
Technical Field
The utility model relates to a sensing technology field, concretely relates to civil engineering measures fiber grating inclinometer sensitization sensor that structure inclination changes.
Background
The monitoring of the inclination and deformation information at different heights or depths along the vertical direction is very important in the engineering fields of high-rise buildings, deep pits, high slopes and the like, and the inclination, deformation conditions and the change trend of the inclination and deformation information can be mastered through monitoring. In the technology for measuring inclination or deformation, the traditional electrical inclinometer is very commonly applied, for example, in slope deformation monitoring, a worker drills a hole in the slope along the vertical direction, buries a commercial inclinometer tube, places the electrical inclinometer into the inclinometer tube, sequentially lifts the electrical inclinometer at equal-height intervals from the bottom end of the inclinometer tube, and records deformation values measured by the electrical inclinometer at each height to obtain distributed deformation information of the slope along the vertical direction at different heights. According to the measuring method, because the output signal measured by the electric inclinometer is weak current, on one hand, the instrument has poor anti-interference capability and unstable reading; on the other hand, each measurement of the working personnel must be carried out on the site of the side slope, the work is very inconvenient to develop, the reading results of different working personnel affected by subjectivity are easy to be different, the real-time monitoring cannot be achieved, and the deformation of the side slope and the like cannot be mastered in real time and in time. The fiber grating sensing technology has the outstanding advantages of electromagnetic interference resistance, capability of connecting a plurality of sensors in series for multiplexing, capability of remote real-time monitoring, high precision and the like, and is very suitable for real-time monitoring in severe outdoor environments such as side slopes and the like, so that the distributed deformation measurement technology based on the fiber grating principle is continuously researched.
The fiber grating sensor is one of the most widely used fiber sensors at present, and can measure parameters such as strain, temperature, pressure, displacement, flow, liquid level and the like. The sensing principle is generally based on the change of a measured parameter to cause the change of the grating period and the effective refractive index, thereby causing the change of the characteristic wavelength of the grating, and the parameter is measured by measuring the movement amount of the characteristic wavelength. Through the inquiry of domestic and foreign data, the research on the fiber grating tilt angle sensor is not perfect so far, and the fiber grating tilt angle sensor is still in the exploration and development stage.
The existing fiber grating inclinometer sensor is difficult to be applied to deformation monitoring of an engineering structure due to the defects of low precision, short service life, large volume and the like.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims to solve the technical problem that overcome the shortcoming of having traditional inclinometer and increase inclinometer's sensitivity, provide the all-round sensitization tilt sensor of fiber grating that is arranged in measuring range among the ordinary engineering environment big, measurement accuracy is high, simple structure, convenient to use.
The technical scheme is as follows: the utility model discloses the all-round sensitization tilt sensor of fiber grating can adopt following technical scheme:
an all-round sensitization tilt sensor of fiber grating, including the chassis, fix the body on chassis, the major axis installed in body, install on major axis and the rotating turret swung with the major axis rotation, the minor axis passing the rotating turret, the cross axis located under minor axis, two first eccentric cams installed on cross axis, install two gear shafts installed in body medial surface and set up oppositely separately, install two second eccentric cams on two gear shafts separately, the frame fitted on the peripheral outer fringe of the second eccentric cam, the centre surrounds the horizontal push rod of the first eccentric cam, one end is fixed to minor axis and pendulum rod extending downward; the short shaft is meshed with the transverse shaft through a gear; the rotation of the transverse shaft drives the short shaft to rotate through gear engagement;
two ends of the long shaft are respectively installed on the opposite inner side walls of the shell through rolling bearings, the long shaft is positioned above the short shaft and the gear shaft, and the long shaft is parallel to the gear shaft and is provided with a first gear which is meshed with the gear shaft to drive the gear shaft to rotate; the long axis is perpendicular to the short axis;
the rotating frame is provided with two side faces and two end faces, the short shaft penetrates through the two side faces, the first eccentric cam and the transverse push rod are installed on the outer side surfaces of the side faces, the two ends of the transverse push rod are connected with first elastic ropes, and the other ends of the first elastic ropes are fixed on the end faces of the rotating frame; the first elastic rope is provided with a strain grating;
a second elastic rope is fixed on the frame, and the other end of the second elastic rope extends upwards and is fixed on the inner side of the top end of the shell; the second elastic rope is also provided with a strain grating.
Furthermore, the swing rod rotates to drive the short shaft to rotate to drive the transverse shaft to rotate so as to enable the transverse push rod attached to the first eccentric wheel to generate displacement, the displacement of the transverse push rod enables the first elastic rope connected to the transverse push rod to generate length change, the strain grating on the first elastic rope senses the deformation of the elastic rope to obtain the displacement of the push rod, and the displacement generated by the push rod obtains the angle of the swing rod rotating on the YOZ plane.
Furthermore, the swing rod drives second eccentric cams fixed at the left end and the right end of the long shaft to rotate, the frame is caused to move up and down through the rotation of the two second eccentric cams, and the strain gratings on the second elastic ropes sense the eccentric angles of the second eccentric cams, so that the rotating angles of the swing rod on the XOZ plane are obtained.
Furthermore, the shell comprises a left shell and a right shell, and the chassis, the left shell and the right shell are fixed together by screws.
Furthermore, a balance weight is arranged below the oscillating bar, a fixing piece is arranged in the chassis, and when the fiber bragg grating all-dimensional sensitization tilt sensor is not used, the fixing piece is fixed with the balance weight at the bottom of the oscillating bar.
Furthermore, positioning parts are respectively arranged on two sides of the first eccentric cam, the positioning parts are fixed on the rotating frame, and two ends of the transverse push rod respectively penetrate through the positioning parts on the corresponding sides.
Further, one end of the second elastic rope connected with the frame is fixed in a mode of surrounding the outer edge of the frame.
Has the advantages that: the utility model provides an inclination angle sensor is when using, because there is the inclination pendulum rod on ground and around the minor axis rotation under the action of gravity, the minor axis rotation drives the cam on the cross axle and rotates to make two closed push rods move around, two push rods make the elastic rope elongation change and paste the change that the elastic rope was answered to strain grating on the elastic rope, the pendulum rod left and right rocking angle will arouse the displacement difference of push rod around, can realize the universal pendulum rod in the angle monitoring of the rotation of the universal pendulum rod of XOZ plane through the displacement difference of horizontal push rod around; meanwhile, the swing rod drives the rotating frame to rotate around the long shaft under the action of gravity, the rotating frame swings back and forth to a certain position, the rotating frame rotates to drive the two gears fixed on the long shaft to rotate, and the gears drive the gear shafts to rotate so as to drive the second eccentric cam to rotate. When the circle center of the second eccentric cam and the eccentricity are on the same horizontal line, the elastic rope is just at a fixed length, the two eccentric wheels rotate to cause the extension of the elastic rope, the elastic rope is pasted with a strain grating to sense the eccentric angle of the eccentric wheels, so that the monitoring of the angle of the universal swing rod on the YOZ plane can be realized, and the sum of the rotation angle of the universal swing rod on the XOZ plane and the rotation angle of the universal swing rod on the YOZ plane is the direction of the inclination angle. The utility model discloses can realize 360 degrees all-round real-time supervision at inclination, have advantages such as measuring range is wide, sensitivity is high, simple structure, with low costs, anti bad weather is strong, but wide application in the environment of various complicacies.
Drawings
Fig. 1 is an axonometric view of the all-round sensitization tilt sensor of the fiber grating of the utility model;
FIG. 2 is an internal view of the FBG omni-directional sensitization tilt sensor shown in FIG. 1 with the housing removed;
FIG. 3 is a schematic cross-sectional view of the FBG omni-directional sensitization tilt sensor in FIG. 1;
FIG. 4 is a schematic view of the connection of the first elastic cord with the turret and the transverse pushing bar;
FIG. 5 is an enlarged view of a portion of FIG. 4;
FIG. 6 is a schematic view of the connection of the first elastic cord to the housing and the frame portion.
Detailed Description
Referring to fig. 1 to 6, the present invention discloses an all-directional sensitivity enhanced tilt sensor for fiber grating, which is characterized in that: the device comprises a chassis 6, a shell fixed on the chassis 6, a long shaft 22 arranged in the shell, a rotating frame 3 arranged on the long shaft 22 and swinging along with the rotation of the long shaft, a short shaft 1 penetrating through the rotating frame 3, a transverse shaft 21 positioned below the short shaft 1, two first eccentric cams 9 arranged on the transverse shaft 21, two gear shafts 12 arranged on the inner side surface of the shell and opposite to each other, two second eccentric cams 10 arranged on the two gear shafts 12 respectively, a frame 14 sleeved on the outer edge of the circumference of the second eccentric cam 10, a transverse push rod 11 with the center surrounding the first eccentric cam 9, and a swing rod 2 with one end fixed on the middle position of the short shaft 1 through a set screw 16 and extending downwards. Both gear shafts 12 are mounted inside the housing side walls by rolling bearings 24. The two sides of the first eccentric cam are respectively provided with a positioning part 113, the positioning parts are fixed on the rotating frame 3, and two ends of the transverse push rod 11 respectively penetrate through the positioning parts 113 on the corresponding sides. The short shaft 1 is meshed with the transverse shaft 21 through a gear; the rotation of the transverse shaft drives the short shaft to rotate through gear engagement; the shell comprises a left shell 7 and a right shell 8, and the chassis 6, the left shell 7 and the right shell 8 are fixed together by screws. The transverse shaft 21 is also provided with a fixed disc 18.
Two ends of the long shaft are respectively installed on the opposite inner side walls of the shell through rolling bearings 23, the long shaft 22 is positioned above the short shaft 1 and the gear shaft 12, the long shaft 22 is parallel to the gear shaft 12 and is provided with a first gear 25 which is meshed with the gear shaft 12 to drive the gear shaft 12 to rotate; the major axis 22 is arranged perpendicular to the minor axis 1; the long shaft 22 and the rotating frame 3 are fixed through the constraint button 13.
As shown in fig. 4 and 5, the rotating frame 3 has two side surfaces and two end surfaces, the short shaft 1 penetrates through the two side surfaces, the first eccentric cam 9 and the transverse push rod 11 are installed on the outer side surfaces of the side surfaces, two ends of the transverse push rod 11 are connected with the first elastic rope 111, and the other end of the first elastic rope 111 is fixed on the end surface of the rotating frame 3; the first elastic rope 111 is provided with a strain grating. In order to facilitate the installation of the short shaft 1, the rotating frame is provided with a rotating frame inserting plate 19 at the position of the short shaft, and after the short shaft is installed, the rotating frame inserting plate 19 is installed again.
As shown in fig. 6, a second elastic cord 112 is fixed on the frame 14, and the other end of the second elastic cord 112 extends upward and is fixed on the inner side of the top end of the housing; the second elastic string 112 is also provided with a strain grating.
The swing rod 2 and the short shaft 1 are arranged in the structure: the swing rod 2 rotates to drive the short shaft 1 to rotate to drive the cross shaft to rotate so as to enable the transverse push rod 11 tightly attached to the first eccentric wheel 9 to generate displacement, the displacement of the transverse push rod 11 enables the first elastic rope 111 connected to the transverse push rod 11 to generate length change, the strain grating on the first elastic rope senses the deformation of the elastic rope to obtain the displacement of the push rod, the displacement generated by the push rod obtains the rotating angle of the swing rod 2 on the YOZ plane, and the XYZ coordinate system of the YOZ plane refers to the figure 1.
The oscillating bar 2 and the long shaft 7 are arranged in the structure: the swing link 2 drives the second eccentric cams 10 fixed at the left and right ends of the long shaft 7 to rotate, the frame 14 is caused to move up and down by the rotation of the two second eccentric cams 10, the strain gratings on the second elastic rope 112 sense the eccentric angle of the second eccentric cams 10, and thus the angle of the swing link 2 rotated on the XOZ plane is obtained, and the XYZ coordinate system where the XOZ plane is located is also shown in fig. 1. The end of the second elastic cord 112 connected to the frame 14 is secured in a manner that surrounds the outer edge of the frame.
In order to make the swing of the swing rod 2 more sensitive, a counter weight 2 can be arranged below the swing rod 2, a fixing part 15 is arranged in the chassis, and when the fiber bragg grating all-directional sensitization tilt angle sensor is not used, the fixing part is fixed with the counter weight at the bottom of the swing rod 2, as shown in fig. 3.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a fiber grating all-round sensitization tilt angle sensor which characterized in that: the device comprises a chassis (6), a shell fixed on the chassis (6), a long shaft (22) arranged in the shell, a rotating frame (3) arranged on the long shaft (22) and swinging along with the rotation of the long shaft, a short shaft (1) penetrating through the rotating frame (3), a transverse shaft (21) positioned below the short shaft (1), two first eccentric cams (9) arranged on the transverse shaft (21), two gear shafts (12) respectively arranged on the inner side surface of the shell and oppositely arranged, two second eccentric cams (10) respectively arranged on the two gear shafts (12), a frame (14) sleeved on the outer edge of the circumference of the second eccentric cam (10), a transverse push rod (11) with the center surrounding the first eccentric cam (9), and a swing rod (2) with one end hinged on the short shaft (1) and extending downwards; the short shaft (1) is in meshed connection with the transverse shaft (21) through a gear; the rotation of the transverse shaft drives the short shaft to rotate through gear engagement;
two ends of the long shaft are respectively installed on the opposite inner side walls of the shell through rolling bearings, the long shaft (22) is positioned above the short shaft (1) and the gear shaft (12), and the long shaft (22) is parallel to the gear shaft (12) and is provided with a first gear (25) which is meshed with the gear shaft (12) to drive the gear shaft (12) to rotate; the long axis (22) is perpendicular to the short axis (1);
the rotating frame (3) is provided with two side faces and two end faces, the short shaft (1) penetrates through the two side faces, the first eccentric cam (9) and the transverse push rod (11) are installed on the outer side surface of the side faces, two ends of the transverse push rod (11) are connected with the first elastic rope (111), and the other end of the first elastic rope (111) is fixed on the end face of the rotating frame (3); the first elastic rope (111) is provided with a strain grating;
a second elastic rope (112) is fixed on the frame (14), and the other end of the second elastic rope (112) extends upwards and is fixed on the inner side of the top end of the shell; the second elastic rope (112) is also provided with a strain grating.
2. The fiber grating omni-directional sensitization tilt sensor according to claim 1, characterized in that: the swing rod (2) rotates to drive the short shaft (1) to rotate to drive the transverse shaft to rotate so as to enable the transverse push rod (11) attached to the first eccentric cam (9) to generate displacement, the displacement of the transverse push rod (11) enables the first elastic rope (111) connected to the transverse push rod (11) to generate length change, the strain grating on the first elastic rope senses the deformation of the elastic rope to obtain the displacement of the push rod, and the displacement generated by the push rod obtains the rotating angle of the swing rod (2) on the YOZ plane.
3. The fiber grating omni-directional sensitization tilt sensor according to claim 1 or 2, wherein: the swing rod (2) drives the second eccentric cams (10) fixed at the left end and the right end of the long shaft (22) to rotate, the frame (14) is caused to move up and down through the rotation of the two second eccentric cams (10), and the strain gratings on the second elastic ropes (112) sense the eccentric angles of the second eccentric cams (10), so that the angles of the swing rod (2) rotating on the XOZ plane are obtained.
4. The fiber grating omni-directional sensitization tilt sensor according to claim 3, wherein: the shell comprises a left shell (7) and a right shell (8), and the chassis (6), the left shell (7) and the right shell (8) are fixed together by screws.
5. The fiber grating omni-directional sensitization tilt sensor according to claim 4, wherein: a balance weight is arranged below the swing rod (2), a fixing piece (15) is arranged in the chassis, and when the fiber bragg grating all-dimensional sensitization tilt angle sensor is not used, the fixing piece is fixed with the balance weight at the bottom of the swing rod (2).
6. The fiber grating omni-directional sensitization tilt sensor according to claim 1, characterized in that: positioning parts (113) are respectively arranged on two sides of the first eccentric cam, the positioning parts are fixed on the rotating frame (3), and two ends of the transverse push rod (11) respectively penetrate through the positioning parts (113) on the corresponding sides.
7. The fiber grating omni-directional sensitization tilt sensor according to claim 1, characterized in that: one end of the second elastic rope (112) connected with the frame (14) is fixed in a mode of surrounding the outer edge of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238601.4U CN209927104U (en) | 2019-02-26 | 2019-02-26 | All-round sensitization tilt angle sensor of fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238601.4U CN209927104U (en) | 2019-02-26 | 2019-02-26 | All-round sensitization tilt angle sensor of fiber grating |
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| CN209927104U true CN209927104U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920238601.4U Withdrawn - After Issue CN209927104U (en) | 2019-02-26 | 2019-02-26 | All-round sensitization tilt angle sensor of fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764830A (en) * | 2019-02-26 | 2019-05-17 | 南京东智安全科技有限公司 | A kind of comprehensive enhanced sensitivity obliquity sensor of fiber grating |
| CN115183741A (en) * | 2022-07-01 | 2022-10-14 | 武汉理工大学 | Fiber grating tilt angle sensor |
-
2019
- 2019-02-26 CN CN201920238601.4U patent/CN209927104U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764830A (en) * | 2019-02-26 | 2019-05-17 | 南京东智安全科技有限公司 | A kind of comprehensive enhanced sensitivity obliquity sensor of fiber grating |
| CN109764830B (en) * | 2019-02-26 | 2024-04-05 | 南京东智安全科技有限公司 | Omnibearing sensitization inclination sensor of fiber bragg grating |
| CN115183741A (en) * | 2022-07-01 | 2022-10-14 | 武汉理工大学 | Fiber grating tilt angle sensor |
| CN115183741B (en) * | 2022-07-01 | 2023-12-26 | 武汉理工大学 | Optical fiber grating inclination sensor |
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